Title :
An importance sampling analysis of a sub-carrier synchronized OFDM/QAM
Author :
Ammari, Mohamed L. ; Fortier, Paul ; Huynh, Tuê H.
Author_Institution :
Dept. of Electr. & Comput. Eng., Laval Univ., Que., Canada
Abstract :
In this paper, we propose an importance sampling (IS) analysis of an OFDM system which employs local equalization. IS is a fast Monte-Carlo simulation technique which aims to reduce the variance of a given simulation estimator (or the number of required simulation samples). The simulated system is a an equalized OFMD model with 512 sub-carriers. The equalizers, using a learning sequence, estimate the frequency response of the channel at each sub-carrier. By applying the IS simulation technique, we have estimated a BER of the order of 10-5 with only 1000 simulations. The gain in simulation time is exceptional
Keywords :
OFDM modulation; equalisers; error statistics; frequency response; importance sampling; parameter estimation; quadrature amplitude modulation; synchronisation; BER; IS simulation; OFDM system; channel frequency response estimation; equalized OFMD model; fast Monte-Carlo simulation; importance sampling analysis; learning sequence; local equalization; simulated system; simulation estimator; simulation samples; simulation time estimation; sub-carrier synchronized OFDM/QAM; Additive white noise; Bit error rate; Computational Intelligence Society; Digital communication; Frequency estimation; Frequency response; Gaussian noise; Monte Carlo methods; OFDM; Quadrature amplitude modulation;
Conference_Titel :
Global Telecommunications Conference, 2000. GLOBECOM '00. IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-6451-1
DOI :
10.1109/GLOCOM.2000.891242
